May Discobs 2026

[Mrs.J]

.86” with a lot more coming in. 1.88” for the event so far. 

[Weather Will]

Really beneficial rain and since we are near the head of the Potomac in MD this benefits the entire basin.  Perhaps we will remember this weekend as the true beginning of the pattern change toward El Niño. Approaching 2 inches so far. (Pouring right now!)

[yoda]

51 degrees and rain on May 22nd... unbelievable 

[mdhokie]

7 hours ago, RIC_WX said:

49/47 at Deep Creek.  Steady rain, clouds, wind, even more utility disruptions than normal.  .66" yesterday and .38" so far today.  Does not appear that the temperature will move much (if any) prior to Sunday afternoon and the rain chances appear categorical most of that time.

With respect to holiday weekend plans, consider anywhere else.  A real disappointment for the people and the limited economy up here sadly, they can't really make it up when a holiday period is washed out like this.

Yea this stuff sucks. I have some tiling to do but the kids are gonna be bored all weekend. Maybe we'll check out the Oakland railroad museum. 

[WEATHER53]

58.3 for high and looks like a lull incoming 

[WEATHER53]

Good steady soaking  now 0,70”

[AnEndlessMaze]

49 degrees and running the heat on Memorial Day weekend after it was nearly 100 degrees four days ago- my brain can’t grasp this bimodal spring 

[wxmeddler]

8 hours ago, BlizzardNole said:

Radar trend looks good for central and northern MD and spotty at best down here.  My county went into this at just 9.2" since Jan 1 for a departure of -7.3.  Look at those soil moistures (20-40% is what you want)

<snip map>

Correct, but it highly depends on the soil characteristics. The measurement here is Volumetric Water Content (WVC).

Soil is made out of Soil, Air, and Water. The balance of which changes with precipitation and temperature. The soil fraction remains constant, usually between 50 and 60%. It is soil after all. The rest is either microscopic air pockets or water. The air pockets are just void spaces which water could occupy. When there are no air pockets left. It’s just soil and water which of course is called Mud.

A VWC of .4 means it’s 40% water, which means that there likely isn’t much air left. This indicates that the soil can’t take much more water, and will start to run off into streams.

The VWC in which that happens varies. Sand for example saturates as low as .2 while Clay can go to .5 or even slightly higher. It just depends on the soil present. 

We’re gathering data to try to estimate/ establish the thresholds not only each location but also each depth. In the future we hope to have some sort of parameter that goes from 0-100, so there isn’t the VWC guesswork of saturation.